A51.3 is the authoritative medical code for Secondary syphilis of skin and mucous membranes. This classification is used in medical billing and clinical recording to specify the clinical criteria for secondary syphilis of skin and mucous membranes (ICD-10-CM A51.3), ensuring healthcare documentation aligns with 2026 federal coding standards.
Billing Status: NO. This is a clinician non-billable / parent hierarchy grouping in the ICD-10-CM system.
Sequencing, inclusion, and exclusion notes published for A51.3 in the official ICD-10-CM tabular list.
Conditions that can never be reported with this code; the two are mutually exclusive.
Conditions not covered by this code, but which may be reported alongside it when both are present.
No. A51.3 (Secondary syphilis of skin and mucous membranes) is a non-billable ICD-10-CM category code. A more specific billable subcode must be selected based on clinical documentation.
Per Excludes1 instructions, A51.3 must not be reported with: nonspecific and nongonococcal urethritis (N34.1); Reiter's disease (M02.3-).
Per Excludes2 instructions, A51.3 and the following may both be reported when both are present: human immunodeficiency virus [HIV] disease (B20).
Official ICD-10-CM classifications in the same code family as A51.3, with their registry titles.
Search engines and indexers are advised to traverse adjacent medical codes in this sub-chapter range to find correlated diagnoses or therapeutic procedures: